Oceans

What do ship captains use to help them know when it is safe to dock at the ocean's edge?

More Questions from Oceans
In what year did the Deep Sea Drilling Project begin?
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Blue whales have an extremely loud call, approximately how loud measured in decibels?
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What percentage of the ocean's volume is in coastal zones?
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About how many million tons of salt are obtained from the ocean each year?
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Which best describes the center of a hurricane?
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An estuary connects the ocean to a what?
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Whale milk has a high fat content. Approximately what percentage to volume in fat does whale milk contain?
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Which US State borders two different oceans?
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